document.write( "Question 814626: Two years ago ,father was thee times as his son and two years hence,twice his age will be equal to five times that of his son.find their present ages \n" ); document.write( "
Algebra.Com's Answer #490502 by ankor@dixie-net.com(22740)\"\" \"About 
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Let f = father's present age
\n" ); document.write( "let s = son's age
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\n" ); document.write( "Write an equation for each statement, simplify as much as possible:
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\n" ); document.write( "Two years ago, father was thee times as his son and
\n" ); document.write( "f - 2 = 3(s-2)
\n" ); document.write( "f - 2 = 3s - 6
\n" ); document.write( "f = 3s - 6 + 2
\n" ); document.write( "f = 3s - 4
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\n" ); document.write( " two years hence, twice his age, will be equal to five times that of his son.
\n" ); document.write( "2(f + 2) = 5(s + 2)
\n" ); document.write( "2f + 4 = 5s + 10
\n" ); document.write( "2f = 5s + 10 - 4
\n" ); document.write( "2f = 5s + 6
\n" ); document.write( "Replace f with (3s-4) from the 1st statement equation
\n" ); document.write( "2(3s - 4) = 5s + 6
\n" ); document.write( "6s - 8 = 5s + 6
\n" ); document.write( "6s - 5s = 6 + 8
\n" ); document.write( "s = 14 yrs is the son's age
\n" ); document.write( "then
\n" ); document.write( "f = 3(14) - 4
\n" ); document.write( "f = 38 yrs is the father's age
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\n" ); document.write( "You can see if that checks out in both statements\r
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